What is this code demonstrating about URL manipulation with the History API?
const link = document.createElement('a');
link.href = document.location.href;
// Modify the URL without navigating
link.search = '?page=2';
link.hash = '#section3';
// Update browser history and URL
history.pushState(null, '', link.href);
This code demonstrates using an anchor element as a URL parser/builder: 1) It creates an anchor (a) element but doesn't add it to the document—it's used purely for URL manipulation, 2) Setting the href initially to the current location creates a starting point for modifications, 3) The anchor element's properties (search, hash, pathname, etc.) provide a convenient API for URL manipulation, 4) Modifying these properties updates the element's href attribute with proper URL encoding, 5) This approach avoids manual string concatenation and ensures proper URL formatting, 6) The final URL is then used with pushState() to update the browser history and address bar, 7) This pattern is cleaner than manually constructing URLs with string operations, 8) It's particularly useful when building URLs with multiple dynamic components that need proper encoding.